package main

import (
	"flag"
	"bufio"
	"io"
	"os"
	"fmt"
	"time"
	"strconv"
	"strings"
	"encoding/binary"
	"bytes"

	
)

type binHead struct 
{
	model 		uint32
	version		uint32
	buildDate	uint32
	crc32val	uint32
	
	headLen		uint32
	dataLen		uint32
	buildTime	uint32
	reserved2 	uint32
	align 		[120]uint32
}

const (
	BOARD_MAGIC_NUMBER = 0x407
	maxFileLen = 1024 * 1024
	binHeadLen = 128 * 4
)

func Buf_read(filePth string, buf []byte) int {
    f, err := os.Open(filePth)
    if err != nil {
    	fmt.Printf("open file %s failed\n", filePth)
        os.Exit(1)
    }
    defer f.Close()
   
	bfRd := bufio.NewReader(f)

	n, err := bfRd.Read(buf)
	if err != nil && err != io.EOF { //遇到任何错误立即返回，并忽略 EOF 错误信息
		fmt.Printf("read file %s failed\n", filePth)
	    os.Exit(1)
	}
    return n
}


func coverVersion(v string) uint32{
	a := strings.Split(v, ".")
	if(len(a) == 2) {
		dec1, err1 := strconv.Atoi(a[0])
		dec2, err2 := strconv.Atoi(a[1])
		if err1 == nil && err2 == nil{
			var n uint32 = uint32(dec1 << 8) + uint32(dec2)
			return n
		}
	}
	fmt.Println("版本格式不正确，正确格式 -v 1.10")
	os.Exit(1)
	return 0
}


func (p *binHead) output(src []byte) []byte{
	b_buf := new(bytes.Buffer)
	binary.Write(b_buf, binary.LittleEndian,p)
	head := b_buf.Bytes()
	head = append(head, src...)
	return head
}

func printBinhead (bin binHead) []byte{
	buf := fmt.Sprintf("model\t\t: 0x%08X\r\n", bin.model)
	buf += fmt.Sprintf("version\t\t: 0x%08X\r\n", bin.version)
	buf += fmt.Sprintf("buildDate\t: 0x%08X\r\n", bin.buildDate)
	buf += fmt.Sprintf("crc32val\t: 0x%08X\r\n", bin.crc32val)
	
	buf += fmt.Sprintf("headLen\t\t: 0x%08X\r\n", bin.headLen)
	buf += fmt.Sprintf("dataLen\t\t: 0x%08X\r\n", bin.dataLen)
	buf += fmt.Sprintf("buildTime\t: 0x%08X\r\n", bin.buildTime)
	buf += fmt.Sprintf("reserved2\t: 0x%08X\r\n", bin.reserved2)
	fmt.Printf("%s", buf)
	return []byte(buf)
}



func main() {
	var bin binHead
	var version string
	
	flag.StringVar(&version, "v", "1.00", "output hex file version")
	flag.Parse()

	buf := make([]byte, maxFileLen)
    buflen := Buf_read(UserCfg.App0.FileName, buf)
	fmt.Printf("\r\n读取app0文件成功，长度%d字节\r\n", buflen)
	fmt.Println("程序版本:", version)
	bin.model		= UserCfg.Product
	bin.version		= coverVersion(version)
	bin.buildDate	= getDateUint32()
	bin.crc32val	= calcrc32(buf[:buflen])
	bin.headLen		= binHeadLen
	bin.dataLen		= uint32(buflen)
	bin.buildTime	= getTimeUint32()
	winfo := printBinhead(bin)
	wdata := bin.output(buf[:buflen])
	path := "v" + version
	makeUpdateBin(path, wdata[:])
	makeInfoTxt(path, winfo[:])
	makeAllHex(path)
}

func makeUpdateBin(path string, data []byte) {
	binName := "update.bin"
	app0binPathName := MakePathName(path, binName)
	n := Writefile(app0binPathName, data, 0)
	fmt.Printf("write update bin file %d bytes\r\n", n)
}

func makeInfoTxt(path string, data []byte) {
	fileName := "fileinfo.txt"
	filePathName := MakePathName(path, fileName)
	n := Writefile(filePathName, data, 0)
	fmt.Printf("write fileinfo.txt %d bytes\r\n", n)
}

func makeAllHex(path string) {
	/*boot 文件放在本地文件夹*/
	var hex HexFormat
	hexName := "all.hex"
	binName := "update.bin"
	hexPathName := MakePathName(path, hexName)
	app0binPathName := MakePathName(path, binName)
	hex.ConvertBin2Hex(UserCfg.Boot.FileName, hexPathName, UserCfg.Boot.Addr)
	hex.ConvertBin2Hex(app0binPathName, hexPathName, UserCfg.App0.Addr)
}


var CRC32_Table = [256]uint32{
   0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
   0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
   0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
   0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
   0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
   0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
   0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
   0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
   0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
   0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
   0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
   0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
   0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
   0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
   0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
   0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
   0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
   0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
   0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
   0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
   0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
   0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
   0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
   0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
   0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
   0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
   0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
   0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
   0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
   0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
   0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
   0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
   0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
   0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
   0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
   0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
   0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
   0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
   0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
   0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
   0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
   0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
   0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
   0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
   0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
   0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
   0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
   0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
   0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
   0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
   0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
   0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
   0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
   0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
   0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
   0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
   0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
   0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
   0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
   0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
   0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
   0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
   0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
   0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D}


func calcrc32(a []byte) uint32{
	var uCRCValue uint32 = 0xFFFFFFFF
	for _, num := range a{
		uCRCValue = CRC32_Table[(uCRCValue ^ uint32(num)) & 0xFF] ^ (uCRCValue >> 8)	
	}
	return uCRCValue ^ 0xFFFFFFFF
}


func getDateUint32() uint32{
	var n uint32 =  uint32((time.Now().Year() % 100 )* 10000)
	n += uint32(time.Now().Month()  * 100)
	n += uint32(time.Now().Day())
	return n
}


func getTimeUint32() uint32{
	var n uint32 =  uint32((time.Now().Hour() % 100 )* 10000)
	n += uint32(time.Now().Minute()  * 100)
	n += uint32(time.Now().Second())
	return n
}





